How big is the world’s biggest book? The Guinness World Record goes to “This the Prophet Muhammed,” a 16-foot tall, 13-foot wide giant with 429 pages. Also, the book that explains Brazil’s rules for paying taxes is ridiculous: it’s 6 feet 10 inches tall, and has more than 41,000 pages. But the heavyweight winner might be “The Pali Canon” (Buddhist scripture), whose 1,460 pages are actually 5-foot stone tablets. Tough to carry in your backpack!

*Wee ones:* Which is taller, the 5-foot stone “book” or the 6-foot paper book?

*Little kids:* If you can reach 6 feet high off the ground, how many feet taller is the 16-foot tall book? *Bonus:* If Richard Scarry’s “Biggest Word Book Ever” is 2 feet tall, how many would you have to stack end to end to match the 16-foot book?

*Big kids:* When you open that 13-footwide book, it becomes twice as wide! How far across the “table” would it stretch? *Bonus:* Brazil’s tax code weighs “several tons.” If it weighs 4 tons and you can carry 10 pounds on your back, how many kids like you would it take to carry the Brazil book? (Reminder if needed: A ton equals 2,000 pounds.)

Answers:

*Wee ones:* The 6-foot book.

*Little kids:* 10 feet taller. *Bonus:* 8 of them.

*Big kids:* 26 feet — as wide as a small house. *Bonus:* 800 kids, since the book weighs 8,000 pounds!

And thank you Genevieve for a real page-turner of a math problem!